+++ /dev/null
-/*
- * Wired Ethernet driver interface
- * Copyright (c) 2005-2009, Jouni Malinen <j@w1.fi>
- * Copyright (c) 2004, Gunter Burchardt <tira@isx.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
- */
-
-#include "includes.h"
-#include <sys/ioctl.h>
-#include <net/if.h>
-#ifdef __linux__
-#include <netpacket/packet.h>
-#include <net/if_arp.h>
-#include <net/if.h>
-#endif /* __linux__ */
-#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
-#include <net/if_dl.h>
-#endif /* defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__) */
-#ifdef __sun__
-#include <sys/sockio.h>
-#endif /* __sun__ */
-
-#include "common.h"
-#include "eloop.h"
-#include "driver.h"
-
-#ifdef _MSC_VER
-#pragma pack(push, 1)
-#endif /* _MSC_VER */
-
-struct ieee8023_hdr {
- u8 dest[6];
- u8 src[6];
- u16 ethertype;
-} STRUCT_PACKED;
-
-#ifdef _MSC_VER
-#pragma pack(pop)
-#endif /* _MSC_VER */
-
-static const u8 pae_group_addr[ETH_ALEN] =
-{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 };
-
-
-struct wpa_driver_wired_data {
- char ifname[IFNAMSIZ + 1];
- void *ctx;
-
- int sock; /* raw packet socket for driver access */
- int dhcp_sock; /* socket for dhcp packets */
- int use_pae_group_addr;
-
- int pf_sock;
- int membership, multi, iff_allmulti, iff_up;
-};
-
-
-/* TODO: detecting new devices should eventually be changed from using DHCP
- * snooping to trigger on any packet from a new layer 2 MAC address, e.g.,
- * based on ebtables, etc. */
-
-struct dhcp_message {
- u_int8_t op;
- u_int8_t htype;
- u_int8_t hlen;
- u_int8_t hops;
- u_int32_t xid;
- u_int16_t secs;
- u_int16_t flags;
- u_int32_t ciaddr;
- u_int32_t yiaddr;
- u_int32_t siaddr;
- u_int32_t giaddr;
- u_int8_t chaddr[16];
- u_int8_t sname[64];
- u_int8_t file[128];
- u_int32_t cookie;
- u_int8_t options[308]; /* 312 - cookie */
-};
-
-
-static int wired_multicast_membership(int sock, int ifindex,
- const u8 *addr, int add)
-{
-#ifdef __linux__
- struct packet_mreq mreq;
-
- if (sock < 0)
- return -1;
-
- os_memset(&mreq, 0, sizeof(mreq));
- mreq.mr_ifindex = ifindex;
- mreq.mr_type = PACKET_MR_MULTICAST;
- mreq.mr_alen = ETH_ALEN;
- os_memcpy(mreq.mr_address, addr, ETH_ALEN);
-
- if (setsockopt(sock, SOL_PACKET,
- add ? PACKET_ADD_MEMBERSHIP : PACKET_DROP_MEMBERSHIP,
- &mreq, sizeof(mreq)) < 0) {
- perror("setsockopt");
- return -1;
- }
- return 0;
-#else /* __linux__ */
- return -1;
-#endif /* __linux__ */
-}
-
-
-#ifdef __linux__
-static void handle_data(void *ctx, unsigned char *buf, size_t len)
-{
-#ifdef HOSTAPD
- struct ieee8023_hdr *hdr;
- u8 *pos, *sa;
- size_t left;
- union wpa_event_data event;
-
- /* must contain at least ieee8023_hdr 6 byte source, 6 byte dest,
- * 2 byte ethertype */
- if (len < 14) {
- wpa_printf(MSG_MSGDUMP, "handle_data: too short (%lu)",
- (unsigned long) len);
- return;
- }
-
- hdr = (struct ieee8023_hdr *) buf;
-
- switch (ntohs(hdr->ethertype)) {
- case ETH_P_PAE:
- wpa_printf(MSG_MSGDUMP, "Received EAPOL packet");
- sa = hdr->src;
- os_memset(&event, 0, sizeof(event));
- event.new_sta.addr = sa;
- wpa_supplicant_event(ctx, EVENT_NEW_STA, &event);
-
- pos = (u8 *) (hdr + 1);
- left = len - sizeof(*hdr);
- drv_event_eapol_rx(ctx, sa, pos, left);
- break;
-
- default:
- wpa_printf(MSG_DEBUG, "Unknown ethertype 0x%04x in data frame",
- ntohs(hdr->ethertype));
- break;
- }
-#endif /* HOSTAPD */
-}
-
-
-static void handle_read(int sock, void *eloop_ctx, void *sock_ctx)
-{
- int len;
- unsigned char buf[3000];
-
- len = recv(sock, buf, sizeof(buf), 0);
- if (len < 0) {
- perror("recv");
- return;
- }
-
- handle_data(eloop_ctx, buf, len);
-}
-
-
-static void handle_dhcp(int sock, void *eloop_ctx, void *sock_ctx)
-{
- int len;
- unsigned char buf[3000];
- struct dhcp_message *msg;
- u8 *mac_address;
- union wpa_event_data event;
-
- len = recv(sock, buf, sizeof(buf), 0);
- if (len < 0) {
- perror("recv");
- return;
- }
-
- /* must contain at least dhcp_message->chaddr */
- if (len < 44) {
- wpa_printf(MSG_MSGDUMP, "handle_dhcp: too short (%d)", len);
- return;
- }
-
- msg = (struct dhcp_message *) buf;
- mac_address = (u8 *) &(msg->chaddr);
-
- wpa_printf(MSG_MSGDUMP, "Got DHCP broadcast packet from " MACSTR,
- MAC2STR(mac_address));
-
- os_memset(&event, 0, sizeof(event));
- event.new_sta.addr = mac_address;
- wpa_supplicant_event(eloop_ctx, EVENT_NEW_STA, &event);
-}
-#endif /* __linux__ */
-
-
-static int wired_init_sockets(struct wpa_driver_wired_data *drv, u8 *own_addr)
-{
-#ifdef __linux__
- struct ifreq ifr;
- struct sockaddr_ll addr;
- struct sockaddr_in addr2;
- int n = 1;
-
- drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_PAE));
- if (drv->sock < 0) {
- perror("socket[PF_PACKET,SOCK_RAW]");
- return -1;
- }
-
- if (eloop_register_read_sock(drv->sock, handle_read, drv->ctx, NULL)) {
- printf("Could not register read socket\n");
- return -1;
- }
-
- os_memset(&ifr, 0, sizeof(ifr));
- os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
- if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) {
- perror("ioctl(SIOCGIFINDEX)");
- return -1;
- }
-
- os_memset(&addr, 0, sizeof(addr));
- addr.sll_family = AF_PACKET;
- addr.sll_ifindex = ifr.ifr_ifindex;
- wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
- addr.sll_ifindex);
-
- if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
- perror("bind");
- return -1;
- }
-
- /* filter multicast address */
- if (wired_multicast_membership(drv->sock, ifr.ifr_ifindex,
- pae_group_addr, 1) < 0) {
- wpa_printf(MSG_ERROR, "wired: Failed to add multicast group "
- "membership");
- return -1;
- }
-
- os_memset(&ifr, 0, sizeof(ifr));
- os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
- if (ioctl(drv->sock, SIOCGIFHWADDR, &ifr) != 0) {
- perror("ioctl(SIOCGIFHWADDR)");
- return -1;
- }
-
- if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
- printf("Invalid HW-addr family 0x%04x\n",
- ifr.ifr_hwaddr.sa_family);
- return -1;
- }
- os_memcpy(own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
-
- /* setup dhcp listen socket for sta detection */
- if ((drv->dhcp_sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
- perror("socket call failed for dhcp");
- return -1;
- }
-
- if (eloop_register_read_sock(drv->dhcp_sock, handle_dhcp, drv->ctx,
- NULL)) {
- printf("Could not register read socket\n");
- return -1;
- }
-
- os_memset(&addr2, 0, sizeof(addr2));
- addr2.sin_family = AF_INET;
- addr2.sin_port = htons(67);
- addr2.sin_addr.s_addr = INADDR_ANY;
-
- if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_REUSEADDR, (char *) &n,
- sizeof(n)) == -1) {
- perror("setsockopt[SOL_SOCKET,SO_REUSEADDR]");
- return -1;
- }
- if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_BROADCAST, (char *) &n,
- sizeof(n)) == -1) {
- perror("setsockopt[SOL_SOCKET,SO_BROADCAST]");
- return -1;
- }
-
- os_memset(&ifr, 0, sizeof(ifr));
- os_strlcpy(ifr.ifr_ifrn.ifrn_name, drv->ifname, IFNAMSIZ);
- if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_BINDTODEVICE,
- (char *) &ifr, sizeof(ifr)) < 0) {
- perror("setsockopt[SOL_SOCKET,SO_BINDTODEVICE]");
- return -1;
- }
-
- if (bind(drv->dhcp_sock, (struct sockaddr *) &addr2,
- sizeof(struct sockaddr)) == -1) {
- perror("bind");
- return -1;
- }
-
- return 0;
-#else /* __linux__ */
- return -1;
-#endif /* __linux__ */
-}
-
-
-static int wired_send_eapol(void *priv, const u8 *addr,
- const u8 *data, size_t data_len, int encrypt,
- const u8 *own_addr)
-{
- struct wpa_driver_wired_data *drv = priv;
- struct ieee8023_hdr *hdr;
- size_t len;
- u8 *pos;
- int res;
-
- len = sizeof(*hdr) + data_len;
- hdr = os_zalloc(len);
- if (hdr == NULL) {
- printf("malloc() failed for wired_send_eapol(len=%lu)\n",
- (unsigned long) len);
- return -1;
- }
-
- os_memcpy(hdr->dest, drv->use_pae_group_addr ? pae_group_addr : addr,
- ETH_ALEN);
- os_memcpy(hdr->src, own_addr, ETH_ALEN);
- hdr->ethertype = htons(ETH_P_PAE);
-
- pos = (u8 *) (hdr + 1);
- os_memcpy(pos, data, data_len);
-
- res = send(drv->sock, (u8 *) hdr, len, 0);
- os_free(hdr);
-
- if (res < 0) {
- perror("wired_send_eapol: send");
- printf("wired_send_eapol - packet len: %lu - failed\n",
- (unsigned long) len);
- }
-
- return res;
-}
-
-
-static void * wired_driver_hapd_init(struct hostapd_data *hapd,
- struct wpa_init_params *params)
-{
- struct wpa_driver_wired_data *drv;
-
- drv = os_zalloc(sizeof(struct wpa_driver_wired_data));
- if (drv == NULL) {
- printf("Could not allocate memory for wired driver data\n");
- return NULL;
- }
-
- drv->ctx = hapd;
- os_strlcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
- drv->use_pae_group_addr = params->use_pae_group_addr;
-
- if (wired_init_sockets(drv, params->own_addr)) {
- os_free(drv);
- return NULL;
- }
-
- return drv;
-}
-
-
-static void wired_driver_hapd_deinit(void *priv)
-{
- struct wpa_driver_wired_data *drv = priv;
-
- if (drv->sock >= 0)
- close(drv->sock);
-
- if (drv->dhcp_sock >= 0)
- close(drv->dhcp_sock);
-
- os_free(drv);
-}
-
-
-static int wpa_driver_wired_get_ssid(void *priv, u8 *ssid)
-{
- ssid[0] = 0;
- return 0;
-}
-
-
-static int wpa_driver_wired_get_bssid(void *priv, u8 *bssid)
-{
- /* Report PAE group address as the "BSSID" for wired connection. */
- os_memcpy(bssid, pae_group_addr, ETH_ALEN);
- return 0;
-}
-
-
-static int wpa_driver_wired_get_capa(void *priv, struct wpa_driver_capa *capa)
-{
- os_memset(capa, 0, sizeof(*capa));
- capa->flags = WPA_DRIVER_FLAGS_WIRED;
- return 0;
-}
-
-
-static int wpa_driver_wired_get_ifflags(const char *ifname, int *flags)
-{
- struct ifreq ifr;
- int s;
-
- s = socket(PF_INET, SOCK_DGRAM, 0);
- if (s < 0) {
- perror("socket");
- return -1;
- }
-
- os_memset(&ifr, 0, sizeof(ifr));
- os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
- if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
- perror("ioctl[SIOCGIFFLAGS]");
- close(s);
- return -1;
- }
- close(s);
- *flags = ifr.ifr_flags & 0xffff;
- return 0;
-}
-
-
-static int wpa_driver_wired_set_ifflags(const char *ifname, int flags)
-{
- struct ifreq ifr;
- int s;
-
- s = socket(PF_INET, SOCK_DGRAM, 0);
- if (s < 0) {
- perror("socket");
- return -1;
- }
-
- os_memset(&ifr, 0, sizeof(ifr));
- os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
- ifr.ifr_flags = flags & 0xffff;
- if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
- perror("ioctl[SIOCSIFFLAGS]");
- close(s);
- return -1;
- }
- close(s);
- return 0;
-}
-
-
-static int wpa_driver_wired_multi(const char *ifname, const u8 *addr, int add)
-{
- struct ifreq ifr;
- int s;
-
-#ifdef __sun__
- return -1;
-#endif /* __sun__ */
-
- s = socket(PF_INET, SOCK_DGRAM, 0);
- if (s < 0) {
- perror("socket");
- return -1;
- }
-
- os_memset(&ifr, 0, sizeof(ifr));
- os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
-#ifdef __linux__
- ifr.ifr_hwaddr.sa_family = AF_UNSPEC;
- os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
-#endif /* __linux__ */
-#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
- {
- struct sockaddr_dl *dlp;
- dlp = (struct sockaddr_dl *) &ifr.ifr_addr;
- dlp->sdl_len = sizeof(struct sockaddr_dl);
- dlp->sdl_family = AF_LINK;
- dlp->sdl_index = 0;
- dlp->sdl_nlen = 0;
- dlp->sdl_alen = ETH_ALEN;
- dlp->sdl_slen = 0;
- os_memcpy(LLADDR(dlp), addr, ETH_ALEN);
- }
-#endif /* defined(__FreeBSD__) || defined(__DragonFly__) || defined(FreeBSD_kernel__) */
-#if defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__)
- {
- struct sockaddr *sap;
- sap = (struct sockaddr *) &ifr.ifr_addr;
- sap->sa_len = sizeof(struct sockaddr);
- sap->sa_family = AF_UNSPEC;
- os_memcpy(sap->sa_data, addr, ETH_ALEN);
- }
-#endif /* defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__) */
-
- if (ioctl(s, add ? SIOCADDMULTI : SIOCDELMULTI, (caddr_t) &ifr) < 0) {
- perror("ioctl[SIOC{ADD/DEL}MULTI]");
- close(s);
- return -1;
- }
- close(s);
- return 0;
-}
-
-
-static void * wpa_driver_wired_init(void *ctx, const char *ifname)
-{
- struct wpa_driver_wired_data *drv;
- int flags;
-
- drv = os_zalloc(sizeof(*drv));
- if (drv == NULL)
- return NULL;
- os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
- drv->ctx = ctx;
-
-#ifdef __linux__
- drv->pf_sock = socket(PF_PACKET, SOCK_DGRAM, 0);
- if (drv->pf_sock < 0)
- perror("socket(PF_PACKET)");
-#else /* __linux__ */
- drv->pf_sock = -1;
-#endif /* __linux__ */
-
- if (wpa_driver_wired_get_ifflags(ifname, &flags) == 0 &&
- !(flags & IFF_UP) &&
- wpa_driver_wired_set_ifflags(ifname, flags | IFF_UP) == 0) {
- drv->iff_up = 1;
- }
-
- if (wired_multicast_membership(drv->pf_sock,
- if_nametoindex(drv->ifname),
- pae_group_addr, 1) == 0) {
- wpa_printf(MSG_DEBUG, "%s: Added multicast membership with "
- "packet socket", __func__);
- drv->membership = 1;
- } else if (wpa_driver_wired_multi(ifname, pae_group_addr, 1) == 0) {
- wpa_printf(MSG_DEBUG, "%s: Added multicast membership with "
- "SIOCADDMULTI", __func__);
- drv->multi = 1;
- } else if (wpa_driver_wired_get_ifflags(ifname, &flags) < 0) {
- wpa_printf(MSG_INFO, "%s: Could not get interface "
- "flags", __func__);
- os_free(drv);
- return NULL;
- } else if (flags & IFF_ALLMULTI) {
- wpa_printf(MSG_DEBUG, "%s: Interface is already configured "
- "for multicast", __func__);
- } else if (wpa_driver_wired_set_ifflags(ifname,
- flags | IFF_ALLMULTI) < 0) {
- wpa_printf(MSG_INFO, "%s: Failed to enable allmulti",
- __func__);
- os_free(drv);
- return NULL;
- } else {
- wpa_printf(MSG_DEBUG, "%s: Enabled allmulti mode",
- __func__);
- drv->iff_allmulti = 1;
- }
-
- return drv;
-}
-
-
-static void wpa_driver_wired_deinit(void *priv)
-{
- struct wpa_driver_wired_data *drv = priv;
- int flags;
-
- if (drv->membership &&
- wired_multicast_membership(drv->pf_sock,
- if_nametoindex(drv->ifname),
- pae_group_addr, 0) < 0) {
- wpa_printf(MSG_DEBUG, "%s: Failed to remove PAE multicast "
- "group (PACKET)", __func__);
- }
-
- if (drv->multi &&
- wpa_driver_wired_multi(drv->ifname, pae_group_addr, 0) < 0) {
- wpa_printf(MSG_DEBUG, "%s: Failed to remove PAE multicast "
- "group (SIOCDELMULTI)", __func__);
- }
-
- if (drv->iff_allmulti &&
- (wpa_driver_wired_get_ifflags(drv->ifname, &flags) < 0 ||
- wpa_driver_wired_set_ifflags(drv->ifname,
- flags & ~IFF_ALLMULTI) < 0)) {
- wpa_printf(MSG_DEBUG, "%s: Failed to disable allmulti mode",
- __func__);
- }
-
- if (drv->iff_up &&
- wpa_driver_wired_get_ifflags(drv->ifname, &flags) == 0 &&
- (flags & IFF_UP) &&
- wpa_driver_wired_set_ifflags(drv->ifname, flags & ~IFF_UP) < 0) {
- wpa_printf(MSG_DEBUG, "%s: Failed to set the interface down",
- __func__);
- }
-
- if (drv->pf_sock != -1)
- close(drv->pf_sock);
-
- os_free(drv);
-}
-
-
-const struct wpa_driver_ops wpa_driver_wired_ops = {
- .name = "wired",
- .desc = "Wired Ethernet driver",
- .hapd_init = wired_driver_hapd_init,
- .hapd_deinit = wired_driver_hapd_deinit,
- .hapd_send_eapol = wired_send_eapol,
- .get_ssid = wpa_driver_wired_get_ssid,
- .get_bssid = wpa_driver_wired_get_bssid,
- .get_capa = wpa_driver_wired_get_capa,
- .init = wpa_driver_wired_init,
- .deinit = wpa_driver_wired_deinit,
-};
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